Blackheart LS Engine Swap Transmission Crossmember

Name: Blackheart LS Engine Swap Transmission Crossmember
Brand: HOOKER HEADERS
SKU: 520-12627
Price: 358.95 USD
Availability: InStock

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Ships on Sep 08, 2026

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GM F-Body, X-Body

1967-1969 GM F-Body
1968-1974 GM X-Body
Fits: 4L80/4L85 Transmission

Integral component of the complete Hooker swap system for this application. Component features unique geometry that is not compatible for use with any other brand of engine mounting components.
Facilitates installation of a 4L80/4L85 GM automatic transmission behind an LS engine in any year 1st-gen F-body or 3rd-gen X-body
Designed using CAD modeling/FEA analysis for optimal fitment, strength, weight, safety and appearance
High-strength low-alloy steel construction
Provides an engineered 3 to 3-1/2 degree engine/transmission inclination angle that is critical to obtaining suitable U-joint working angles, when installed with Hooker 1st-gen F-Body & X-body LS engine swap brackets
Designed in conjunction with Hooker 1st-gen F-body & X-body LS engine swap brackets to provide bolt-in installation of Hooker LS swap headers and exhaust systems for this application
Will install with either a stock rubber, or Prothane poly transmission mount (p/n 311-7-1604-BL)
Provides the highest clearance available for up to 3' exhaust system routing

Transmission Crossmembers to Take the Guesswork Out of Your Engine or Transmission Swap

Hooker Blackheart CAD-designed, powder-coated steel crossmembers provide a durable-strength foundation for transmission mounting; while leaving adequate clearance for a host of Hooker Blackheart engine and exhaust components.

Part TypeAutomatic Transmission Crossmember

Product LineHooker Blackheart Transmission Crossmembers

BrandHOOKER HEADERS

Package Height4.8

Package Width12.6

Package Length31.1

Weight24.99 PG

Part CategoryPerformance Parts

Engine TypeGM LS

Transmission Mount IncludedNo

Body TypeGM F Body, GM X Body

Crossmember FinishBlack